<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-top-bottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.currentCity}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-top-bottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper"
                         v-for="item in hotCities"
                         :key="item.id"
                         @click="handleCityClick(item.name)"
                    >
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div class="area"
                 v-for="(item, key) of cities"
                 :key="key"
                 :ref="key"
            >
                <div class="title border-top-bottom">{{key}}</div>
                <div class="item-list"
                     v-for="innerItem of item"
                     :key="innerItem.id"
                     @click="handleCityClick(innerItem.name)"
                >
                    <div class="item boder-bottom">{{innerItem.name}}</div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    hotCities: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  data () {
    return {
      letterList: []
    }
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push({path: '/'})
    },
    ...mapMutations(['changeCity'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.wrapper)
  }
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .border-top-bottom
    &:before
      border-color #ccc
    &:after
      border-color #ccc
  .boder-bottom
    &:before
      border-color red
  .list
    overflow hidden
    position absolute
    top 1.58rem
    left 0
    bottom 0
    right 0
    .title
        line-height .54rem
        background #eee
        padding-left .2rem
        color #666
        font-size .26rem
    .button-list
        overflow hidden
        padding .1rem .6rem .1rem .1rem
        .button-wrapper
            float left
            width 33.33%
        .button
            margin .1rem
            text-align center
            border .02rem solid #ccc
            padding .1rem 0
            border-radius .06rem
    .item-list
        .item
            line-height .76rem
            padding-left .2rem
</style>
